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From: Ingo Molnar <mingo@kernel.org>
To: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Jason Low <jason.low2@hp.com>,
	Peter Zijlstra <peterz@infradead.org>,
	Thomas Gleixner <tglx@linutronix.de>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
	"Paul E. McKenney" <paulmck@linux.vnet.ibm.com>,
	Andrew Morton <akpm@linux-foundation.org>,
	Oleg Nesterov <oleg@redhat.com>,
	Mike Galbraith <umgwanakikbuti@gmail.com>,
	Frederic Weisbecker <fweisbec@gmail.com>,
	Mel Gorman <mgorman@suse.de>,
	Steven Rostedt <rostedt@goodmis.org>,
	Preeti U Murthy <preeti@linux.vnet.ibm.com>,
	hideaki.kimura@hp.com, Aswin Chandramouleeswaran <aswin@hp.com>,
	Scott J Norton <scott.norton@hp.com>
Subject: Re: [PATCH 0/3] sched, timer: Improve scalability of itimers
Date: Wed, 15 Apr 2015 09:24:23 +0200	[thread overview]
Message-ID: <20150415072422.GA13449@gmail.com> (raw)
In-Reply-To: <CA+55aFzqiSk1fMiTcTAODr5m6hwj49h0SKN+GA1biNavAkAKQQ@mail.gmail.com>


* Linus Torvalds <torvalds@linux-foundation.org> wrote:

> On Tue, Apr 14, 2015 at 4:09 PM, Jason Low <jason.low2@hp.com> wrote:
> > This patchset improves the scalability of itimers, thread_group_cputimer
> > and addresses a performance issue we found while running a database
> > workload where more than 30% of total time is spent in the kernel
> > trying to acquire the thread_group_cputimer spinlock.
> 
> I'm ok with this series, but I'm going to assume that I'll get it
> through the scheduler tree. Ingo?

Yeah, will pick them up!

Thanks,

	Ingo

      reply	other threads:[~2015-04-15  7:24 UTC|newest]

Thread overview: 34+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-04-14 23:09 [PATCH 0/3] sched, timer: Improve scalability of itimers Jason Low
2015-04-14 23:09 ` [PATCH 1/3] sched, timer: Remove usages of ACCESS_ONCE in the scheduler Jason Low
2015-04-14 23:59   ` Steven Rostedt
2015-04-15  2:12     ` Jason Low
2015-04-15  2:40       ` Steven Rostedt
2015-04-15  7:46         ` Ingo Molnar
2015-04-15 18:49           ` Jason Low
2015-04-15 19:16             ` Steven Rostedt
2015-04-16  2:46           ` Jason Low
2015-04-16 16:52           ` Peter Zijlstra
2015-04-16 18:02             ` Ingo Molnar
2015-04-16 18:15               ` Peter Zijlstra
2015-04-16 18:24                 ` Ingo Molnar
2015-04-16 19:02                   ` Peter Zijlstra
2015-04-16 19:41                     ` Paul E. McKenney
2015-04-17  3:25                   ` Jason Low
2015-04-17  8:19                     ` Ingo Molnar
2015-04-16 21:00                 ` Jason Low
2015-04-16  2:29         ` Jason Low
2015-04-16  2:37           ` Steven Rostedt
2015-04-14 23:09 ` [PATCH 2/3] sched, timer: Use atomics for thread_group_cputimer to improve scalability Jason Low
2015-04-15  7:33   ` Ingo Molnar
2015-04-15  7:35     ` Ingo Molnar
2015-04-15 17:14       ` Jason Low
2015-04-15 10:37   ` Preeti U Murthy
2015-04-15 19:09     ` Jason Low
2015-04-15 13:25   ` Frederic Weisbecker
2015-04-15 13:32     ` Peter Zijlstra
2015-04-15 20:04       ` Jason Low
2015-04-15 14:23   ` Davidlohr Bueso
2015-04-15 21:15     ` Jason Low
2015-04-14 23:09 ` [PATCH 3/3] sched, timer: Use cmpxchg to do updates in update_gt_cputime() Jason Low
2015-04-14 23:53 ` [PATCH 0/3] sched, timer: Improve scalability of itimers Linus Torvalds
2015-04-15  7:24   ` Ingo Molnar [this message]

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